US 12,070,436 B2
Pneumatic massage
Guilherme Hartenberg Watson, LaSalle (CA); Wade O'Moore, Belle River (CA); Horia Blendea, LaSalle (CA); Renato Colja, Windsor (CA); and Robert J. McMillen, Tecumseh (CA)
Assigned to LEGGETT & PLATT CANADA CO., Halifax (CA)
Filed by Leggett & Platt Canada Co., Halifax (CA)
Filed on Jun. 29, 2023, as Appl. No. 18/344,618.
Application 18/344,618 is a continuation of application No. 17/929,281, filed on Sep. 1, 2022, granted, now 11,752,062.
Application 17/929,281 is a continuation of application No. 17/320,470, filed on May 14, 2021, granted, now 11,458,066, issued on Oct. 4, 2022.
Application 17/320,470 is a continuation of application No. 16/359,709, filed on Mar. 20, 2019, granted, now 11,039,975, issued on Jun. 22, 2021.
Application 16/359,709 is a continuation in part of application No. 16/116,433, filed on Aug. 29, 2018, granted, now 11,285,076, issued on Sep. 6, 2022.
Prior Publication US 2023/0338224 A1, Oct. 26, 2023
Int. Cl. A61H 9/00 (2006.01); B60N 2/90 (2018.01)
CPC A61H 9/0071 (2013.01) [B60N 2/976 (2018.02); A61H 9/0078 (2013.01); A61H 2201/0149 (2013.01); A61H 2201/0169 (2013.01); A61H 2201/1207 (2013.01); A61H 2201/1238 (2013.01); A61H 2201/1409 (2013.01); A61H 2201/5056 (2013.01); B60N 2/914 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A pneumatic system comprising:
a fluidic switching module including
an air connection inlet configured for connection to a source of pressurized air,
a plurality of air connection outlets each in fluid communication with the air connection inlet,
a first cascading subsystem downstream from and in fluid communication with the air connection inlet and configured to receive a pressurized airflow from the air connection inlet,
a second cascading subsystem downstream from and in fluid communication with the first cascading subsystem, and
a third cascading subsystem downstream from and in fluid communication with the first cascading subsystem,
wherein the first cascading subsystem is configured to passively bias the pressurized airflow from the air connection inlet to the second cascading subsystem, wherein the second cascading subsystem is in fluid communication with a first and a second air connection outlet of the plurality of air connection outlets, and wherein the second cascading subsystem is configured to passively bias the pressurized airflow received from the first cascading subsystem between the first and second air connection outlets in a staggered fashion,
wherein the first cascading subsystem is configured to switch and deflect the pressurized airflow from the second cascading subsystem to the third cascading subsystem in response to a first backpressure received from the second cascading subsystem,
wherein the third cascading subsystem is in fluid communication with a third and a fourth air connection outlet of the plurality of air connection outlets,
wherein the third cascading subsystem is configured to passively bias the pressurized airflow between the third and fourth air connection outlets in a staggered fashion,
wherein the first cascading subsystem is configured to switch and deflect the pressurized airflow from the third cascading subsystem back to the second cascading subsystem in response to a second backpressure received from the third cascading subsystem, and
wherein the fluidic switching module is configured to cyclically and sequentially direct the pressurized airflow between the plurality of air connection outlets without any moving parts or external controls.